SE454476B - SET FOR MAKING PRINTED CIRCUITS - Google Patents
SET FOR MAKING PRINTED CIRCUITSInfo
- Publication number
- SE454476B SE454476B SE8005443A SE8005443A SE454476B SE 454476 B SE454476 B SE 454476B SE 8005443 A SE8005443 A SE 8005443A SE 8005443 A SE8005443 A SE 8005443A SE 454476 B SE454476 B SE 454476B
- Authority
- SE
- Sweden
- Prior art keywords
- copper
- solution
- bath
- degreased
- walls
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
- 238000005530 etching Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 9
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910000679 solder Inorganic materials 0.000 claims description 7
- 239000002585 base Substances 0.000 claims description 6
- 239000002966 varnish Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000007650 screen-printing Methods 0.000 claims description 5
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 4
- -1 alkali metal cyanide Chemical class 0.000 claims description 4
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 4
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 claims description 4
- 229940065287 selenium compound Drugs 0.000 claims description 4
- 150000003343 selenium compounds Chemical class 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 239000008139 complexing agent Substances 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 150000001879 copper Chemical class 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 230000002829 reductive effect Effects 0.000 claims description 3
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 3
- 229960002218 sodium chlorite Drugs 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 3
- 210000005069 ears Anatomy 0.000 claims 2
- 239000004922 lacquer Substances 0.000 claims 1
- 238000002386 leaching Methods 0.000 claims 1
- 239000011241 protective layer Substances 0.000 claims 1
- 238000005476 soldering Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- VDMJCVUEUHKGOY-JXMROGBWSA-N (1e)-4-fluoro-n-hydroxybenzenecarboximidoyl chloride Chemical compound O\N=C(\Cl)C1=CC=C(F)C=C1 VDMJCVUEUHKGOY-JXMROGBWSA-N 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 2
- ICSNLGPSRYBMBD-UHFFFAOYSA-N 2-aminopyridine Chemical compound NC1=CC=CC=N1 ICSNLGPSRYBMBD-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- RFLFDJSIZCCYIP-UHFFFAOYSA-L palladium(2+);sulfate Chemical compound [Pd+2].[O-]S([O-])(=O)=O RFLFDJSIZCCYIP-UHFFFAOYSA-L 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- GVRDSQPRIZURHB-UHFFFAOYSA-N B.C(C)NCC.[Na] Chemical compound B.C(C)NCC.[Na] GVRDSQPRIZURHB-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- JZULKTSSLJNBQJ-UHFFFAOYSA-N chromium;sulfuric acid Chemical compound [Cr].OS(O)(=O)=O JZULKTSSLJNBQJ-UHFFFAOYSA-N 0.000 description 1
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- LKUCSBHCLHXINO-UHFFFAOYSA-N cyanatoselanyl cyanate Chemical class N#CO[Se]OC#N LKUCSBHCLHXINO-UHFFFAOYSA-N 0.000 description 1
- 150000003959 diselenides Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- KYEKHFSRAXRJBR-UHFFFAOYSA-M potassium;selenocyanate Chemical compound [K+].[Se-]C#N KYEKHFSRAXRJBR-UHFFFAOYSA-M 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/42—Plated through-holes or plated via connections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
- H05K3/061—Etching masks
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/42—Plated through-holes or plated via connections
- H05K3/425—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern
- H05K3/428—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern initial plating of through-holes in substrates having a metal pattern
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/05—Patterning and lithography; Masks; Details of resist
- H05K2203/0502—Patterning and lithography
- H05K2203/0542—Continuous temporary metal layer over metal pattern
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/14—Related to the order of processing steps
- H05K2203/1423—Applying catalyst before etching, e.g. plating catalyst in holes before etching circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3452—Solder masks
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing Of Printed Wiring (AREA)
- Manufacturing Of Printed Circuit Boards (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
- ing And Chemical Polishing (AREA)
Description
'454 476 Uppgiften löses enligt uppfinningen medelst ett förfarande, som uppvisar de i krav 1 angivna kännetecknen. The object is solved according to the invention by means of a method which exhibits the features stated in claim 1.
Föredragna utföringsformer av detta förfarande består i att kopparkascheringen enligt steg d) i krav 1 svetsas medelst en sur etslösning, lämpligen en sur ammoniumpersulfat-lösning eller en alkalisk etslösning, lämpligen en ammoniakalisk lösning av natri- umklorit, att sedan etsskyddsskiktet enligt steg e) avlägsnas medelst en 3- till 5-procentig natronlut eller medelst ett organiskt lösningsme- del, lämpligen metylenklorid, att man som lack enligt steg f) använder en lödstopplack, att man i steg g) använder ett stabiliserat kemiskt kopparbad, att man använder ett kemiskt kopparbad, innehållande såsom väsent- liga beståndsdelar ett kopparsalt, en komplexbildare, formaldehyd samt en alkalicyanid och eventuellt en selenförening som stabilisa- torer och att bly-tenn-legeringen enligt steg h) anbringas i form av en smäl- ta genom inverkan av högvärmd luft eller genom reduktiv avskiljning från ett kemiskt tennbad.Preferred embodiments of this method consist in that the copper laminating according to step d) in claim 1 is welded by means of an acid etching solution, preferably an acidic ammonium persulfate solution or an alkaline etching solution, preferably an ammoniacal solution of sodium chlorite, that then the etch protection layer according to step e) is removed by means of a 3- to 5% sodium hydroxide solution or by means of an organic solvent, preferably methylene chloride, that a solder stop varnish is used as the varnish according to step f), that a stabilized chemical copper bath is used in step g), that a chemical copper bath is used , containing as essential constituents a copper salt, a complexing agent, formaldehyde and an alkali metal cyanide and optionally a selenium compound as stabilizers and that the lead-tin alloy according to step h) is applied in the form of a melt by the action of highly heated air or by reductive separation from a chemical tin bath.
Sättet enligt uppfinningen möjliggör på ett framstående sätt fram- ställning av kvalitativt högvärda miniatyriserade kopplingar, spe- ciellt aüägt positivtryckmetoden. Härvid bildas det finaste led- ningsnät med en kvalitet, som annars kan uppnås endast vid använd- ning av fototryck. Förfarandet uppvisar dessutom den stora fördelen, att det utgående från kopparkascherat basmaterial möjliggör fram- ställning av det finaste ledningsnät med en bredd av under 100 pm med de bästa isolations- och ytmotståndsvärden.The method according to the invention enables in a prominent way the production of high-quality miniaturized couplings, especially the positive pressure method. In this case, the finest pipe network is formed with a quality that can otherwise only be achieved when using photo printing. The process also has the great advantage that, starting from copper-laminated base material, it is possible to produce the finest pipe network with a width of less than 100 μm with the best insulation and surface resistance values.
En ytterligare väsentlig fördel är inbesparingen av kemisk koppar- badlösning, vilket är av speciell ekonomisk betydelse.An additional significant advantage is the saving of chemical copper bath solution, which is of special economic importance.
En framstående teknisk betydelse har även det faktum, att man i motsats till aëêitivtekniken kan avstå från bindemedelsbelagt respektive kärnkatalyserat basmaterial, varigenom de höga fordrin- garna på bindemedelsbeläggningen och den oxidativa upplösningen av bindemedelsskiktet med kromsvavelsyra bortfaller. Sättet enligt uppfinningen är därmed speciellt miljövänligt. 454 476 Som lämpligt basmaterial kan exempelvis nämnas fenolhartshârdpap- per, epoxihartspapper och speciellt glasfiberförstärkt epoxiharts.An outstanding technical significance is also the fact that, in contrast to the alternative technology, it is possible to dispense with binder-coated or core-catalyzed base material, as a result of which the high demands on the binder coating and the oxidative dissolution of the binder layer with chromium sulfuric acid are eliminated. The method according to the invention is thus particularly environmentally friendly. 454 476 Phenol resin hard papers, epoxy resin paper and especially glass fiber-reinforced epoxy resin can be mentioned as suitable base material.
Sättet enligt uppfinningen genomföres exempelvis på så sätt att plattorna borras respektive stansas på vanligt sätt och borstas, varefter följer en alkalisk avfettning. Därefter etsas ytan i någon män, t.ex. 5 pm djupt, vilket kan ske genom inverkan av ca 10-procen- tig natriumpersulfatlösning vid 28-32°C. Efter dekapitering, t.ex. med 10-procentig svavelsyra, aktiverar man medelst en aktivator, företrädesvis med en vattenhaltig alkalisk lösning av ett palladi- umkomplex, speciellt palladiumsulfat med 2-aminopyridin, varvid spe- ciellt i borrhålsväggarna en hög beläggningstjocklek måste tillför- säkras i syfte att garantera en aktivering även efter den senare följande etsningen.The method according to the invention is carried out, for example, in such a way that the plates are drilled and punched in the usual manner and brushed, after which an alkaline degreasing follows. Then the surface is etched in some men, e.g. 5 μm deep, which can be done by the action of about 10% sodium persulfate solution at 28-32 ° C. After decapitation, e.g. with 10% sulfuric acid, is activated by means of an activator, preferably with an aqueous alkaline solution of a palladium complex, especially palladium sulphate with 2-aminopyridine, whereby especially in the borehole walls a high coating thickness must be ensured in order to guarantee an active even after the subsequent etching.
Man reducerar sedan genom inverkan av ett reduktionsmedel, t.ex. natriumdietylaminboran, och efterbehandlar på vanligt sätt.It is then reduced by the action of a reducing agent, e.g. sodium diethylamine borane, and finishing in the usual way.
Ett etsskyddsskikt, lämpligen medelst en alkalilöslig siltrycksfärg, som täcker ledningsnätet, anbringas därefter enligt uppfinningen medelst siltryck eller fototryck, varefter till en början koppar- kascheringen svetsas, vilket kan ske genom inverkan antingen av en sur etslösning, t.ex. en sur ammoniumpersulfatlösning, eller av en alkalisk etslösning, t.ex. en ammoniakalisk natriumkloritlösning.An etching protection layer, suitably by means of an alkali-soluble screen printing ink, which covers the pipe network, is then applied according to the invention by means of screen printing or photoprinting, after which the copper laminating is initially welded, which can be effected by either an acid etching solution, e.g. an acidic ammonium persulfate solution, or of an alkaline etching solution, e.g. an ammoniacal sodium chlorite solution.
Därvid måste man beakta en efterföljande optimal spolning av borr- hålen respektive stanshâlen.In doing so, a subsequent optimal flushing of the boreholes and the punching holes must be taken into account.
Efter avlägsnande av etsskyddsskiktet medelst ett lösningsmedel, t.ex. medelst en 3- till 5-procentig natronlut, eller medelst ett orga- niskt lösningsmedel såsom metylenklorid, anbringas sedan enligt upp- finningen till en början ett lackskikt, som lämnar borrhålen fria, för vilket ändamål lämpar sig speciellt en lödstopplack, vilken app- liceras som masktryck. Därefter genomför man, efter vanlig alkalisk avfettning, den kemiska metallavskiljningen i urborrningarna med en skikttjocklek av företrädesvis 15-25 mn koppar, vilket med fördel sker med användning av ett stabiliserat kemiskt kopparbad, vilket företrädesvis som väsentliga beståndsdelar innehåller ett koppar- salt, en komplexbildare, formaldehyd samt en alkalicyanid och even- tuellt en selenförening som stabilisatorer. i454 476 Den avslutande partiella appliceringen av en bly-tenn-legering, lämpligen enligt ett varmluftsförfarande genom inverkan av högvärmd luft, garanterar en rent eutektisk lödmetall, som till och med ef- ter accelererad åldring är felfritt lödbar.After removal of the etch protection layer by means of a solvent, e.g. by means of a 3- to 5% sodium hydroxide solution, or by means of an organic solvent such as methylene chloride, a varnish layer is then initially applied according to the invention, which leaves the boreholes free, for which purpose a solder stop varnish is particularly suitable, which is applied as mesh print. Then, after ordinary alkaline degreasing, the chemical metal deposition is carried out in the boreholes with a layer thickness of preferably 15-25 mn copper, which is advantageously done using a stabilized chemical copper bath, which preferably contains a copper salt, a complexing agent as essential constituents. , formaldehyde and an alkali metal cyanide and possibly a selenium compound as stabilizers. i454 476 The final partial application of a lead-tin alloy, suitably according to a hot air process by the action of high-temperature air, guarantees a pure eutectic solder, which even after accelerated aging is flawlessly solderable.
För genomföringen av sättet enligt uppfinningen lämpar sig på ett framstående sätt ett kemiskt kopparbad med ovan beskrivna samman- sättning. Som alkalicyanid kan härför speciellt nämnas natriumcya- nid med koncentrationer av 15-30 mg/liter.A chemical copper bath with the composition described above is suitable for carrying out the method according to the invention. Sodium cyanide with concentrations of 15-30 mg / liter can be mentioned in particular as alkali cyanide.
Lämpade selenföreningar är organiska, oorganiska och organisk-oorga- niska mono- och diselenider och härav speciellt alkaliselencyana- ter såsom kaliumselenocyanat, vilka används i koncentrationer av företrädesvis 0,1-0,3 mg/liter badvätska.Suitable selenium compounds are organic, inorganic and inorganic-inorganic mono- and diselenides and hence especially alkali selenium cyanates such as potassium selenocyanate, which are used in concentrations of preferably 0.1-0.3 mg / liter of bath liquid.
Följande exempel tjänar till att belysa uppfinningen.The following examples serve to illustrate the invention.
Exempel En dubbelsidigt kopparkascherad basplatta av glasfiberförstärkt epoxiharts borrades pâ vanligt sätt, renades mekaniskt (avlägsnan- de av grader) och avfettades sedan alkaliskt vid ca BOOC under en behandlingstid av ca 7 minuter. Därefter etsades plattan lätt (ca 5 mp) genom inverkan av en 10-procentig natriumpersulfatlösning vid en temperatur av ca 28-32°C under loppet av 3 minuter. Därefter betade man med svavelsyra med en halt av 10 vikt-% vid rumstempera- tur och sedan aktiverades med en vattenhaltig alkalisk lösning av palladiumsulfat i 2-aminopyriden, varefter natriumdietylaminofuran såsom reduktionsmedel fick inverka och sedan spolades och torkades.Example A double-sided copper-lacquered base plate of glass fiber reinforced epoxy resin was drilled in the usual manner, mechanically purified (removal of burrs) and then degreased alkaline at about BOOC for a treatment time of about 7 minutes. Thereafter, the plate was lightly etched (about 5 mp) by the action of a 10% sodium persulfate solution at a temperature of about 28-32 ° C for 3 minutes. It was then treated with sulfuric acid having a content of 10% by weight at room temperature and then activated with an aqueous alkaline solution of palladium sulphate in the 2-aminopyride, after which sodium diethylaminofuran was allowed to act as a reducing agent and then rinsed and dried.
Etsskyddsskiktet tryckes därefter enligt positivförfarandet genom siltryckning medelst en alkalisk siltrycksfärg. Tryckningen kan även ske enligt fotoförfarandet, varvid med fördel kan användas en alka- lilöslig vätskeresist. Sedan svetsas kopparen, vilket kan ske genom inverkan av en sur etslösning, t.ex. en sur ammoniumpersulfatlös- ning, eller medelst en alkalisk etslösning såsom en ammoniakalisk lösning av natriumklorid.The etch protection layer is then printed according to the positive process by screen printing by means of an alkaline screen printing ink. The printing can also take place according to the photographic procedure, whereby an alkali-soluble liquid resist can be used to advantage. The copper is then welded, which can be done by the action of an acid etching solution, e.g. an acidic ammonium persulfate solution, or by means of an alkaline etching solution such as an ammoniacal solution of sodium chloride.
Avlägsnandet av siltrycksfärgen kan därefter ske genom behandling med ett lösningsmedel, t.ex. en 3- till 5-procentig natronlut eller med metylenklorid, varefter efterspolas intensivt och torkas.The removal of the sieve ink can then take place by treatment with a solvent, e.g. a 3- to 5% sodium hydroxide solution or with methylene chloride, after which it is intensively rinsed and dried.
Man applicerar sedan en lödstoppmask och avfettar därefter alkaliskt. 454 476 Förkoppringen av urborrningarna genomföres därefter medelst ett stabiliserat kemiskt kopparbad med följande sammansättning: 10 g/liter kopparsulfat CuSO4 . 5H20 30 g/liter etylendiamintetraättiksyra 20 g/liter natriumhydroxid NaOH 0,025 g/liter natriumcyanid NaCN 0,001 g/liter kaliumselenocyanat KSeCN 4 ml formaldehyd, 37-procentig.You then apply a solder stop mask and then degrease alkaline. The pre-copper plating of the boreholes is then carried out by means of a stabilized chemical copper bath with the following composition: 10 g / liter of copper sulphate CuSO4. 5H 2 O 30 g / liter of ethylenediaminetetraacetic acid 20 g / liter of sodium hydroxide NaOH 0.025 g / liter of sodium cyanide NaCN 0.001 g / liter of potassium selenocyanate KSeCN 4 ml of formaldehyde, 37%.
Kopparavskiljninqen skedde vid en temperatur av 65°C och under en behandlingstid av 20 timmar med en genomsnittlig utskiljningshas- tighet av 1,5 pm/timme. Om så önskas genomföres därefter en selek- tiv varmluftsförtenning (så kallat HOT~AIR-LEVELLING-förfarande).The copper precipitation took place at a temperature of 65 ° C and for a treatment time of 20 hours with an average precipitation rate of 1.5 μm / hour. If desired, a selective hot air tinning is then performed (so-called HOT ~ AIR LEVELING procedure).
Man erhåller ledningsnät med en skikttjocklek av ca 30 pm med elekt- riska specifikationer av minst 1 . 10125).Wire mesh is obtained with a layer thickness of about 30 μm with electrical specifications of at least 1. 10125).
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792932536 DE2932536A1 (en) | 1979-08-09 | 1979-08-09 | METHOD FOR PRODUCING PRINTED CIRCUITS |
Publications (2)
Publication Number | Publication Date |
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SE8005443L SE8005443L (en) | 1981-02-10 |
SE454476B true SE454476B (en) | 1988-05-02 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SE8005443A SE454476B (en) | 1979-08-09 | 1980-07-29 | SET FOR MAKING PRINTED CIRCUITS |
Country Status (10)
Country | Link |
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JP (1) | JPS5629395A (en) |
CA (1) | CA1152226A (en) |
CH (1) | CH647372A5 (en) |
DE (1) | DE2932536A1 (en) |
FR (1) | FR2463569B1 (en) |
GB (1) | GB2057774B (en) |
IE (1) | IE49971B1 (en) |
IT (1) | IT1131716B (en) |
NL (1) | NL8003939A (en) |
SE (1) | SE454476B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0090900B1 (en) * | 1982-04-05 | 1987-02-11 | Kanto Kasei Co., Ltd. | Process of manufacturing printed wiring boards and printed wiring boards manufactured by the same |
FI88241C (en) * | 1990-10-30 | 1993-04-13 | Nokia Mobile Phones Ltd | FOERFARANDE FOER FRAMSTAELLNING AV KRETSKORT |
US5358602A (en) * | 1993-12-06 | 1994-10-25 | Enthone-Omi Inc. | Method for manufacture of printed circuit boards |
US5620612A (en) * | 1995-08-22 | 1997-04-15 | Macdermid, Incorporated | Method for the manufacture of printed circuit boards |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1378154A (en) * | 1962-09-24 | 1964-11-13 | North American Aviation Inc | Electrical interconnections for printed circuit boards |
US3269861A (en) * | 1963-06-21 | 1966-08-30 | Day Company | Method for electroless copper plating |
DE1690224B1 (en) * | 1967-08-29 | 1971-03-25 | Standard Elek K Lorenz Ag | BATHROOM FOR ELECTRONIC COPPER PLATING OF PLASTIC PANELS |
FR2128355A1 (en) * | 1971-03-01 | 1972-10-20 | Fernseh Gmbh | |
JPS5489276A (en) * | 1977-12-27 | 1979-07-16 | Fujitsu Ltd | Method of producing printed board |
-
1979
- 1979-08-09 DE DE19792932536 patent/DE2932536A1/en not_active Withdrawn
-
1980
- 1980-07-08 NL NL8003939A patent/NL8003939A/en not_active Application Discontinuation
- 1980-07-17 CH CH5489/80A patent/CH647372A5/en not_active IP Right Cessation
- 1980-07-18 IT IT23530/80A patent/IT1131716B/en active
- 1980-07-29 SE SE8005443A patent/SE454476B/en not_active IP Right Cessation
- 1980-08-07 FR FR8017460A patent/FR2463569B1/en not_active Expired
- 1980-08-08 CA CA000357874A patent/CA1152226A/en not_active Expired
- 1980-08-08 GB GB8025868A patent/GB2057774B/en not_active Expired
- 1980-08-08 JP JP10841080A patent/JPS5629395A/en active Pending
- 1980-08-08 IE IE1669/80A patent/IE49971B1/en unknown
Also Published As
Publication number | Publication date |
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CA1152226A (en) | 1983-08-16 |
SE8005443L (en) | 1981-02-10 |
IT1131716B (en) | 1986-06-25 |
JPS5629395A (en) | 1981-03-24 |
FR2463569A1 (en) | 1981-02-20 |
CH647372A5 (en) | 1985-01-15 |
GB2057774B (en) | 1983-09-07 |
GB2057774A (en) | 1981-04-01 |
NL8003939A (en) | 1981-02-11 |
IT8023530A0 (en) | 1980-07-18 |
DE2932536A1 (en) | 1981-02-26 |
IE49971B1 (en) | 1986-01-22 |
FR2463569B1 (en) | 1985-09-20 |
IE801669L (en) | 1981-02-09 |
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